public void Should_be_possible_to_execute_UNION_operation_on_two_sets_of_referenceTypes_with_null_reference_types()
{
IEnumerable<string> firstReferences = new List<string>() { "10", "20" };
IEnumerable<string> secondReferences = new List<string>();
SetOperation operation = new UnionSetOperation();
IEnumerable<string> results = operation.Execute(firstReferences, secondReferences);
Assert.AreEqual(2, results.Count(), "the quantity of elements is no expected");
}
public void Should_be_possible_to_execute_UNION_operation_on_two_sets_of_referenceTypes_eliminating_duplicate_elements()
{
IEnumerable<string> firstReferences = new List<string>() { "10", "20" };
IEnumerable<string> secondReferences = new List<string>() { "50", "20" };
SetOperation operation = new UnionSetOperation();
IEnumerable<string> results = operation.Execute(firstReferences, secondReferences);
Assert.AreEqual(3, results.Count(), "the quantity of elements is no expected");
string element = results.Where<string>(item => item == "10").SingleOrDefault();
Assert.IsNotNull(element, "the element expected is not exits");
element = results.Where<string>(item => item == "20").SingleOrDefault();
Assert.IsNotNull(element, "the element expected is not exits");
element = results.Where<string>(item => item == "50").SingleOrDefault();
Assert.IsNotNull(element, "the element expected is not exits");
}